For the price, it's difficult to fault these. But I'll give them a review as I would any headphone, no matter the price.
They are clearly based on the legendary 7506 as at a low price. They do not sound like them. Overall they lack bass, and I'm not talking about that over exaggerate bass that some people crave, just a realistic extension. They also lack sparkle in the high mids and highs.
Having said that, they do have a surprisingly wide sound scape and the individual instruments separate well in a mix.
Unlike the 7506, they have a straight cable that is removable/replaceable on a 3.5mm jack, thank you!
Otherwise the construction is pretty good. they look durable and will last with care. They are pretty comfortable too, probably better than the 7506 in that department. The headband is adjustable though a slidey grip with no detents ... no problem so far, but if it works loose over time, it might become one.
Overall, not a bad buy for the money if you just need some extra cans for your friends in the studio to get a respectable mix for tracking. Just don't expect them to be as good as the 7506 and you'll be fine.